<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<h1>字符串 整数  布尔 数组</h1>
	</body>
	<script>
		var str = "javascript的数据类型"
		console.log(str);
		
		var isMan = true;
		console.log(isMan);
		
		var hobby = ["乒乓球","唱歌","爬山"]
		console.log(hobby)
		console.log(hobby[0])
		console.log(hobby[hobby.length-1])
	</script>
</html>
